Special Tools
- Install the NEW output shaft assembly retainer (30).
 
- Install the NEW prop shaft flange O-ring seal (32) into the prop shaft flange (31) - model dependent.
 
- Install the prop shaft flange (31).
 
- Put the transmission in Park.
 
Caution: Refer to Fastener Caution in the Preface section.
- Install the NEW prop shaft flange thrust washer (33) and NEW prop shaft flange nut (34) using GM P/N 89021297.
 
Tighten
Tighten the prop shaft flange nut (34) to 57 N·m(42 lb ft).
- Using either the 
J 45012  or 
J 8614-01  to tighten the prop flange nut.